1. Ubuntu is a community developed, Linux-based operating system that is perfect for laptops, desktops and servers. It contains all the applications you need - a web browser, presentation, document and spreadsheet software, instant messaging and much more.
  2. Multi-platform, fast and packed with features, Okular allows you to read PDF documents, comics and EPub books, browse images, visualize Markdown documents, and much more.
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  3. Kubuntu is an official "flavor" of Ubuntu that uses the KDE Plasma desktop environment. This gives it a completely different look and feel.
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  4. Yakuake is a drop-down (Quake-style) terminal emulator based on KDE Konsole technology. Its design was inspired from consoles in computer games such as Quake which slide down from the top of the screen when a key is pressed, and slide back up when the key is pressed again.
  5. Calligra Suite is an office and graphic art suite by KDE. It is available for desktop PCs, tablet computers, and smartphones. It contains applications for word processing, spreadsheets, presentation, vector graphics, and editing databases.
  6. More than ever people expect a stable desktop with cutting-edge features, all in a package which is easy to use and ready to make their own.
    • FreeOpen Source
    • Linux
    • BSD
    Openbox is a highly configurable, next generation window manager with extensive standards support.

    Discontinued

    No actively developed anymore. Last commit was in 2015.

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    • FreeOpen Source
    • Mac
    • Linux
    • BSD
    • KDE Plasma Workspaces
    Karbon, component of Calligra Suite , is the scalable vector drawing application in KDE. It allows artists to create complex drawings without losing image quality when zooming in on, or resizing the drawing.
  7. Konqueror is an Open Source web browser powered by the KHTML rendering engine (and optionally Webkit) which means it supports the latest web standards such as HTML5, Javascript, CSS3, and others. Konqueror is part of KDEs "kdebase" package.
  8. Kontact is the integrated Personal Information Manager of KDE. Kontact suite unites mature and proven KDE PIM applications under one roof. Thanks to the powerful KPart technology, existing applications are seamlessly integrated into one.
  9. A simple open-source disk benchmark tool for Linux distros.
    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • BSD
    • PortableApps.com
    KVIrc is a free portable IRC client based on the excellent Qt GUI toolkit. KVirc is being written by Szymon Stefanek and the KVIrc Development Team with the contribution of many IRC addicted developers around the world.
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  10. KRename is a very powerful batch file renamer which can rename a list of files based on a set of expressions. It can copy/move the files to another directory or simply rename the input files. KRename supports many conversion operations.
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  11. Features: Standard IRC features. SSL server support. Bookmarking support. Easy to use graphical user interface. Multiple servers and channels in one single window. DCC file transfer. Multiple identities for different servers. Text decorations and colors.
  12. Kexi is considered as a long awaited Open Source competitor for Microsoft Access, Filemaker and Oracle Forms.